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Messages - jj205mi

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CB500/550 / Re: CB500/4 carburetors
« on: November 08, 2015, 07:46:12 PM »
The Honda manual says the compression to be 150-170psi, i thought the bike would be running poorly due to the lack of compression low down rpm. Damn points were before my time lol, i prefer electronic ignition and fuel injection all day.

ill have a look at the contacts, but i don't imagine it will run well with only half the compression it should have, you fellas will have more experience with these machines than me so as i said I'm open to suggestions.

2
CB500/550 / Re: CB500/4 carburetors
« on: November 08, 2015, 06:30:42 PM »
it won't run well enough to take it anywhere lads, I've had it running a fair bit revving it out etc but still no joy. it can't hold an idle etc

3
CB500/550 / Re: CB500/4 carburetors
« on: November 08, 2015, 05:55:55 PM »
well after having a think about it, i decided to do a compression test...



so between 85 and 110psi dry, a wet test seen them jump to 155 and 160psi, so thats a little worse, i guess its a rebuild on the top end.

Can anyone move this to the technical section?

4
CB500/550 / Re: CB500/4 carburetors
« on: November 04, 2015, 10:43:12 PM »
Not really buddy, id like to get it running properly first incase i need anything mind you. there isn't much worth using in the bowls anyway. are you desperate? id be hoping to have this running within the next couple of weeks, after that ill give you a shout

5
CB500/550 / Re: CB500/4 carburetors
« on: November 04, 2015, 09:59:02 PM »
Id like to add my garage isn't always as untidy, I'm having work done in the house and my garage seems to be getting used as a storage area  :'( and my old car is sitting outside in all weathers! not happy about that at all.

6
CB500/550 / Re: CB500/4 carburetors
« on: November 04, 2015, 09:54:54 PM »
Hi guys and sorry for the lack of updates!

Heres a photo of the carbs that came on the bike


The jets were stuck in, the pins that hold the float were solid, i removed 2 by heating the pin with a soldering iron/very small gas torch and pulling on it with pliers. the last two wouldn't move. The throttle was also stuck.

So i picked up another set, they look as if they have been rebuilt, bowls are immaculate, the main jets in 1 or 2 were pretty loose (small o-ring worn?) anyway i got the bike fired up running on 3 found 1 plug to be knackered so i replaced those anyway. So now its running on all 4, although pretty poorly.

Its sooting plugs up and now wanting to idle, seems very rich, idle air screws are set to 2 turns out, i guess next thing is to set float heights, check needle settings.

Heres a Photo of the bike in question





7
CB500/550 / Re: CB500/4 carburetors
« on: October 15, 2015, 01:09:48 PM »
I'm willing to try anything lads, the bowls are really bad I've stripped a few carbs over the years (motorcycle tech at a Honda/Suzuki dealer for 10years) now working at an a tv service centre. But these ones have stuck the float bowl pins  to the float hinge, the needles are stuck in the guides, I told the owner easiest way would be find a better set but as I said I'll try it. Just not my money I'm spending, so that's the issue.

8
CB500/550 / Re: CB500/4 carburetors
« on: October 15, 2015, 10:11:51 AM »
Also meant to add I'm in the UK (Scotland)

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CB500/550 / CB500/4 carburetors
« on: October 15, 2015, 10:10:46 AM »
Hi lads,

Just signed up as I have a friend's bike in to get running, the bike has registered 2000 miles from New but has been stored away with fuel in the carbs, looks like they had tar poured in the bowls and are not in serviceable condition.

I am looking for a decent clean set if possible. Let me know what you have.

John

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